Part of the reason why demography became Michel Foucault’s research on biopolitics, is that it completed the profiling of life in the process of population statistics. Therefore, it is said no less that population is the fundamental concept in biopolitics, than that the statistics reduced the vital life to data and files. Another result of life profiling is the formation of data structure, which is parallel to the structures of things and discourse. Moreover, the algorithmic governmentality is the operative model of data structure, on the base of which algorithm can control and surveil all documented and profiled life. Today,algorithmic governmentality now is becoming a highly intelligent and comprehensive technology of government, which can cope with all risk and deviation in our life. However, we also find that the algorithmic governmentality cannot cover all the aspects of life, that is, there are some lives beyond the range of government. We can call these lives precariats. There is a rudimentary distinction between precariat and life intervened by data, which is the greatest mystery in digital biopolitics.